<template>
  <div>
    <div class="type-nav">
      <div class="container" >
        <div class="nav-left"  @mouseenter="showTask" @mouseleave="hiddenTask">
          <h2 class="all">全部商品分类</h2>
          <transition
            enter-active-class="animate__fadeIn"
            leave-active-class="animate__fadeOut"
          >
            <div class="sort animate__animated" v-show="isShow">
              <div class="all-sort-list2" @click.prevent="categoryItem">
                <div
                  class="item"
                  v-for="c1 in categroyList"
                  :key="c1.categoryId"
                >
                  <h3>
                    <a href="" :data-id="c1.categoryId" data-level="1">{{
                      c1.categoryName
                    }}</a>
                  </h3>
                  <div class="item-list clearfix">
                    <div
                      class="subitem"
                      v-for="c2 in c1.categoryChild"
                      :key="c2.categoryId"
                    >
                      <dl class="fore">
                        <dt>
                          <a href="" :data-id="c2.categoryId" data-level="2">{{
                            c2.categoryName
                          }}</a>
                        </dt>
                        <dd>
                          <em
                            v-for="c3 in c2.categoryChild"
                            :key="c3.categoryId"
                            data-level="3"
                          >
                            <a
                              href=""
                              :data-id="c3.categoryId"
                              data-level="3"
                              >{{ c3.categoryName }}</a
                            >
                          </em>
                        </dd>
                      </dl>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </transition>
        </div>
        <nav class="nav">
          <a href="###">服装城</a>
          <a href="###">美妆馆</a>
          <a href="###">尚品汇超市</a>
          <a href="###">全球购</a>
          <a href="###">闪购</a>
          <a href="###">团购</a>
          <a href="###">有趣</a>
          <a href="###">秒杀</a>
        </nav>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState,mapActions } from 'vuex';
import 'animate.css';
export default {
  name: 'TypeNav',
  data() {
    return {
      //控制数据显示或隐藏，通过v-show(相当于css的display，只会创建一次) 和v-if（会被创建多次），通过定义开关变量来控制状态

      // 默认首页展示
      isShow: this.$route.path === '/home',
    };
  },
  //挂载
  mounted() {
    this.$store.dispatch('home/getCategroyList');
    // console.log(this.$store.state.home.categroyList);
  },
  methods: {
    categoryItem(e) {
      //点击事件源不为a标签，
      if (e.target.localName !== 'a') return;
      const { innerText } = e.target;
      const { id, level } = e.target.dataset;
      const key = `category${level}Id`;
      //router是路由器，管理路由，实现路由跳转等功能， route是路由，主要获取路由的路径，参数等
      this.$router.push({
        path: '/search',
        query: {
          //当先点击搜索按钮，在点击三级列表的时候路径拼接，只要搜索的keywords
          keyword: this.$route.query.keyword,
          categoryName: innerText,
          //变量用中括号
          [key]: id,
        },
      });
    },

    //当鼠标移入到‘全部商品分类’，显示三级分类列表
    showTask() {
      // console.log('移入', 111);
      //当移入是改变状态，让其显示
      this.isShow = true;
    },
    hiddenTask() {
      // console.log('移出', 222);
      //home页面状态始终是显示状态
      if (this.$route.path === '/home') {
        this.isShow = true;
      } else {
        this.isShow = false;
      }
    },
  },

  watch: {
    //监听路径变化，有两个参数，是获取的新值和旧值
    '$route.path'(newPath, oldPath) {
      //当新值切换的路径为：/home时，它的状态为显示状态
      // console.log(newPath, oldPath);
      if (newPath === '/home') {
        this.isShow = true;
      } else {
        this.isShow = false;
      }
    },
  },

  //计算
  computed: {
    //获取home模块中categroyList数据
    ...mapState('home', ['categroyList']),
  },
};
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            // padding: 0 20px;
            margin: 0;

            a {
              color: #333;
              display: block;
              width: 100%;
              height:100%;
              padding: 0 20px;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &:hover {
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
h3 {
  line-height: 30px;
  font-size: 14px;
  font-weight: 400;
  overflow: hidden;
  // padding: 0 20px;
  margin: 0;
  &:hover {
    background-color: #e1251b;
    a {
      color: white;
    }
  }
  a {
    color: #333;
  }
}

dd {
  /*********/
  width: 520px;
  /*********/
}
dt {
  /*********/
  width: 68px;
  /*********/
}

/*reset.css*/
/* 重置文本格式元素 */
a:link:hover {
  color: rgb(79, 76, 212) !important;
  text-decoration: none;
}
.sort {
  --animate-duration: 0.5s;
}
</style>
